MatSchurComplementSetAinvType#
set the type of approximation used for the inverse of the (0,0) block used in forming Sp in MatSchurComplementGetPmat()
Synopsis#
#include "petscksp.h"
PetscErrorCode MatSchurComplementSetAinvType(Mat S, MatSchurComplementAinvType ainvtype)
Not Collective
Input Parameters#
S - matrix obtained with
MatCreateSchurComplement()(or equivalent) and implementing the action of A11 - A10 ksp(A00,Ap00) A01ainvtype - type of approximation to be used to form approximate Schur complement Sp = A11 - A10 inv(DIAGFORM(A00)) A01:
MAT_SCHUR_COMPLEMENT_AINV_DIAG,MAT_SCHUR_COMPLEMENT_AINV_LUMP,MAT_SCHUR_COMPLEMENT_AINV_BLOCK_DIAG, orMAT_SCHUR_COMPLEMENT_AINV_FULL
Options Database Key#
-mat_schur_complement_ainv_type diag | lump | blockdiag | full
See Also#
KSP: Linear System Solvers, MatSchurComplementAinvType, MatCreateSchurComplement(), MatGetSchurComplement(), MatSchurComplementGetPmat(), MatSchurComplementGetAinvType()
Level#
advanced
Location#
src/ksp/ksp/utils/schurm/schurm.c
Index of all KSP routines
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Index of all manual pages